<template>
    <div>
      <!--面包屑导航区-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--卡片视图-->
      <el-card>
        <!--添加啊角色按钮区域-->
        <el-row>
          <el-col>
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>
        <!--角色列表区域-->
        <el-table :data="roleList" border stripe>
          <!--神奇的展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1===0?'bdtop':'', 'vcenter']"
                      v-for="(item1,i1) in scope.row.children" :key="item1.id">
                <!--渲染一级列-->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">
                    {{item1.authName}}
                  </el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--渲染二级和三级权限-->
                <el-col :span="19">
                  <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[i2 === 0?'':'bdtop','vcenter']">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                        {{item2.authName}}
                      </el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag v-for="item3 in item2.children " :key="item3.id" type="warning" closable @close="removeRightById(scope.row,item3.id)">
                        {{item3.authName}}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>

              <pre>
                {{ scope.row }}
              </pre>
            </template>
          </el-table-column>
            <!--索引列-->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
              <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
              <el-button type="warning" icon="el-icon-setting" size="mini"
                         @click="showSetRightDialog(scope.row)" >分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
      <!--分配权限的对话框-->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"  @close="SetRightDialogClosed">
        <!--树形结构-->
        <el-tree :data="rightsList" :props="treeProps" show-checkbox
                 node-key="id" default-expand-all  :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary"  @click="activeRights">确 定</el-button>
  </span>
      </el-dialog>
    </div>
</template>

<script>
    export default {
        name: "Roles",
      data(){
          return {
            roleId:'',
            //所有角色列表数据
            roleList:[],
            //接收角色三级id
            defKeys:[],
             //权限对话框显示与隐藏
            setRightDialogVisible:false,
        //权限数据
        rightsList:[],
       //树形控件属性绑定对象
            treeProps:{
              label:'authName',
              children:'children'
            }
          }
      },
      created() {
          this.getRolesList()
      },
      methods:{
          getRolesList(){
            this.axios.get('roles').then(res=>{
              this.roleList = res.data.data
              //console.log(this.roleList);
            }).catch(err=>{
              return this.$memege.error('获取角色列表失败！')
            })
          },
        //根据id删除对应的三级权限
        async removeRightById(role,rightId){
            //弹框
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).catch(err=>err)

          if(confirmResult !== 'confirm'){
            return this.$memege.info('取消了删除！')
          }
          //地址的拼接，重要！！！！！！
          const {data:res}= await this.axios.delete(`roles/${role.id}/rights/${rightId}`)

          if (res.meta.status !== 200){
            return this.$memege.error('删除权限失败！')
          }
          /*不建议整个getRoleList重新渲染
          this.getRolesList()*/
          role.children = res.data
          },
        //展示分配权限的对话框  role 传递过来是scope.row 就是角色的节点
        async showSetRightDialog(role){
            this.roleId = role.id
            //获取权限数据
       const {data:res}= await this.axios.get('rights/tree')

          if (res.meta.status !== 200) {
            return this.$memege.error('获取权限失败！')
          }
           this.rightsList = res.data
          //递归获取三级节点id
          this.getLeafKeys(role,this.defKeys)

          this.setRightDialogVisible = true
        },
        //通过递归的形式，获取角色权限所有的三级id，保存到空数组 defKeys 中
        getLeafKeys(node,arr){
            //如果当前node 节点没有孩子那么他就是孙子，应该push到数组中去保存
           if(!node.children ){
             return arr.push(node.id)
           }
           node.children.forEach(item => this.getLeafKeys(item,arr))
        },
        //每次关闭权限的展示框都要清空数据，避免累加
        SetRightDialogClosed(){
            this.defKeys = []
        },
        //点击确定为角色分配选中或半选中权限
        async activeRights(){
            const keys = [
              ...this.$refs.treeRef.getCheckedKeys(),
              ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
          console.log(keys);
            const idStr = keys.join(',')
          const {data:res} = await this.axios.post(`roles/${this.roleId}/rights`,{rids:idStr})

          if (res.meta.status !== 200){
            return this.$memege.error('更新权限失败')
          }
          this.$memege.success('成功')
          this.getRolesList()
          this.setRightDialogVisible = false
        }
      }
    }
</script>

<style scoped>
 .el-tag{margin: 7px}
  .bdtop{border-top: 1px solid #eee}
  .bdbottom{border-bottom: 1px solid #eee;}
  .vcenter{display: flex;align-items: center}
</style>
